/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering, 
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 *ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 *GENERATED USING SOFTWARE.
 */
package cgl.narada.transport.util;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class TCPAcceptor extends Thread {

    ServerSocket ss;
    public static void main(String[] args) {
	System.out.println("Usage: java "+TCPAcceptor.class+ " <server port>");
	int servPort = 3045;
	if (args.length == 1)
	    servPort = Integer.parseInt(args[0]);

	TCPAcceptor ta = new TCPAcceptor(servPort);
	ta.setDaemon(true);
	ta.start();
	while(true) {
	    try {
		Thread.sleep(5*1000);
	    } catch (Exception e) {
		continue;
	    }
	}
    }

    public TCPAcceptor(int servPort) {
	try {
	    ss = new ServerSocket(servPort);
	} catch (Exception e) {
	    e.printStackTrace();
	    System.err.println("TCPAcceptor initialization problem at port "+ servPort +", exit");
	    System.exit(0);	    
	}
    }

    public void run() {
	Socket sock = null;
	while(true) {
	    try {
		/* We do cleaning here instead of in a finally clause Because we want to 
		 * continue if there is an exception.
		 */
		if (sock != null && !sock.isClosed())
		    sock.close();
		sock = ss.accept();
		PrintWriter pw = 
		    new PrintWriter(new BufferedWriter(new OutputStreamWriter(sock.getOutputStream())));
		BufferedReader br = new BufferedReader(new InputStreamReader(sock.getInputStream()));
		System.out.println("before read line: remote host="
				   + sock.getInetAddress().getHostAddress()+", port="+ sock.getPort());
		String line = br.readLine();
		if (line != null && line.equals("sesame")) {
		    pw.print("sesame");
		} 
	    } catch (Exception e) {
		e.printStackTrace();
	    }  finally {
		try {
		    Thread.sleep(1000);
		} catch (Exception e) {
		    continue;
		}
	    }
	    
	}

    }

}
